J. F. DiMarzio is a seasoned Android developer and author. He began developing games in Basic on the TRS-80 Color Computer II in 1984. Since then, he has worked in the technology departments of companies such as the U.S. Department of Defense and the Walt Disney Company. He has been developing on the Android platform since the beta release of version .03, and he has published two professional applications and one game on the Android Marketplace. DiMarzio is also an accomplished author. Over the last 10 years, he has released eight books, including Android: A Programmer s Guide. His books have been translated into four languages and published worldwide. DiMarzio s writing style is very easy to read and understand, which makes the information in the topics that he presents more retainable.